test3 - BCH 4053 July 20, 2001 HOUR TEST 3 NAME_ Page 1....

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BCH 4053 July 20, 2001 HOUR TEST 3 NAME___________________ (6) 1. Describe three major structural differences between DNA and RNA. Page Points 1 ____ 2 ____ 3 ____ 4 ____ 5 ____ Total ______ (6) 2. Which form of DNA ( A, B, or Z ) (Put answer in blank) ______has the greatest tilt angle of the base pairs? ______has deoxyguanosine in the syn conformation? ______is favored by high GC content? ______has a left-handed helix? ______is favored by low humidity? ______is formed by RNA double helices? (8) 3. Draw the structure of the following, showing the bases in their proper tautomeric form.: (a) cytosine (b) adenine (c) a ribonucleoside containing uracil (d) a deoxynucleotide containing guanosine (5) 4. Explain why RNA is sensitive to base hydrolysis and DNA is not. What products are formed on base hydrolysis of RNA?
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BCH 4053 --Hour Test 3 Page 2 Name______________________ (6) 5. From the following DNA sequences, write the complimentary sequence under it in the 3' to 5' direction), and circle the bases of the resulting double stranded DNA which are palindrome sequences at least four base pairs in length. 5'-
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test3 - BCH 4053 July 20, 2001 HOUR TEST 3 NAME_ Page 1....

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